1. Each day of play you must pick 1 winner playing an ATP main draw singles match. Of course, the player that you choose, is playing one match scheduled to be played that day (as seen on the order of play).

2. Once you pick someone, you cannot choose them again for the rest of the tournament. So, you don't want to waste your pick on Roddick or Federer to win in early round matches.

3. You must choose one player to win each day. If you forget, are sick, or are unable to reach a computer, it will be treated as a wrong pick, and you will be out of the tournament. You have to submit your own pick, no one else can submit your pick for you.

4. Only in the case of a repeat pick, walkover or a withdrawal of your main pick, each player is allowed to have a back-up pick, selected at the same time as their initial pick. That back-up pick will only be used in the occurance of a walkover or withdrawal, as stated above. Retirements do count as completed matches.